* Change to new logging format (closes#542)
* Adds a screenshots folder that uses the application startup time
* Creating focus nodes for VRT files if the info files contain location information
* Fix issue with removing virtual properties
* Add a method for returning the cartesian coordinates for a geolocation on a planet
- Make it possible to toggle labels again
- Remove Spice calls that lead to exceptions every frame
- Rearrange loading of Spice kernels to reduce error messages
- Set image sequence to hybrid
- Fix height exaggeration slider value range
- Display "No image" for image radio buttons
- Use correct texture clamping method to prevent polar pinch color issue with LinearMipMap
- Add documentation to ImageSequence
